what is the difference between star and delta connection ?
when we use each one ?what is the best ?
Answer Posted / infodoss
STAR Connection:
i)Supply voltage is VL/root3 but supply current
IL(line)=Iph(phase).
DELTA connection:
i)supply voltage is VL=Vph but supply current
is differ.
Both supply used in speed control of induction motor.
Transmission point of viwe delta is better.
Application point of viwe star is better.
| Is This Answer Correct ? | 126 Yes | 17 No |
Post New Answer View All Answers
7- What is the Dissipation Factor and the difference between it and Insulation Resistance Test? 8- What is the task (function) of DC and AC reactors in power plant? 9- What is the task (function) of (open delta with earthed) in some types in transformers? 10- What is the base of the selection of the vector group in transformers? 11- What is the zig-zag transformer and its function by drawing in large detail? 12- What is the polarity ? 13- Why we make short between phase(R) in high side and phase (r) in low side in vector group test? Where High Side ( R ,S and T ) and Low Side ( r ,s and t ). 14- What are the time on delay and time off delay? 15- What is the vector group? 15- What is the task (function) of different types of vector group such as Dyn11 , Dd0 , YNd1,……..,?
what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?
How to calculate earth fault current for 6.6 KV , 50 HZ , 756 Amps , 3000 RPM , 0.8 PF generator
What is the method for testing the differential protection stabilty in generator? When the time of starting What will happen if differentail protection connection wrong means?
how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?
iam preparing for rrb section engineer post in electrical branch.suggest the right textbook for my reference.fromwhere i will get the previous q.papers?
What is d main advantage of using double circuit 3 phase transmission ?
Briefly describe your ideal job?
how much cable size required for 70 kilowatt load.
Define cuttoff frequency?
our industries ht line so power fluctation(once drop of power please rectify causes
can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)
how oil in the MOCB was reduced compared with OCB? what are the features of the MOCB?
Mr. mohh sahid m not satisfied for ur answer to the que weather the size of transformer increases or decreases withchange in fr for more detail go to the answer given by me
What are the three major categories of error?